Question

the fabric mart had cost of goods sold at $844,000 for the year.the beginning inventory at cost was $305,500, and the ending inventory at cost amounted to $414,200. the inventory turn-over rate published as the industry standard for a business of this size is five times...what is the at cost ? what is the inventory turnover rounded to the nearest tenth? what is the largest average inventory needed to theoretically come up to the industry standard? thanks much